> How about 'package/variant' or 'package/variant-of'? +1 for trying to capture the intention in the name, instead of the means of implementation.
-- • attila lendvai • PGP: 963F 5D5F 45C7 DFCD 0A39 -- “Although teachers do care and do work very, very hard, the institution is psychopathic-it has no conscience. It rings a bell and the young man in the middle of writing a poem must close his notebook and move to a different cell where he must memorize that humans and monkeys derive from a common ancestor.” — John Taylor Gatto (1935–2018), 'Dumbing Us Down: The Hidden Curriculum of Compulsory Education' (1992)